If I were giving a technical interview, after asking some basic fizzbuzz style questions, I would just ask a candidate to bring a personal laptop and "do someth

If I were giving a technical interview, after asking some basic fizzbuzz style questions, I would just ask a candidate to bring a personal laptop and "do something cool", i.e. show me what you're good at that is also valuable or useful. Could be spinning up a website, could be some cool parallelized data science or processing job, could be setting up a simple REST server infrastructure, as long as it's done de novo. Has anybody ever been an interviewer or candidate with this kind of interview?